Island



2 Sheets-Sheet I.

A. RICHMOND.

Hot-Air Furnace.

No. 9,360. i Patented 0m. 26, 1852.

2 Sh t Shdef 2. A. RICHMOND.

Hot-Air Furnace.

Paterjted Oct, 26, 1852.

APOLLOS RICHMOND, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO A. C. BARSTOW& CO.

HOT-AIR FURNACE.

i To all whom it may concern:

Be it known that I, AroLLos RICHMOND, of Providence, in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements 1n Heating Apparatus, Applicable to Furnaces,

' &c., and that the following description, taken in connection with theaccompanying drawings, hereinafter referred to, forms a full and exactspecification of the same, wherein I have set forth the nature andprinciples of my said improvements, by which my invention may bedistinguished from others of a similar class, together with such partsas I claim and desire to have secured to me by Letters Patent.

The figures of the accompanying plates of drawings represent myimprovements.

In Plate 1, Figure 1 is a side elevation of a furnace with my improvedradiator attached. In Plate 2, Fig. 2 is a central, longitudinalvertical section of the same.

The object of my improvements is to secure a compact radiator, whichshall give an easy and uninterrupted passage to the smoke and otherproducts of combustion, and retain the same till all the heat isextracted therefrom, and, at the same time, expose as much surface tothe surrounding air as those now in common use. My radiator is intendedto be applied to any kind of heat ing apparatus, and consists of aspirally coiled, elliptical, circular or other shaped pipe, whichcommunicates by a proper flue with the fire chamber and through thewhole of which the smoke, &c., has to pass before it enters the chimney.

a a a in the drawings represents the fire chamber and b b the doorthrough which the fuel is inserted, c 0 is the ash pit and d, (Z the ashpit doors. To the top of the fire chamber is attached the long receivingand discharging fiue e e in the center of which is the damper f. To thisflue e e and connecting therewith, is attached my improved radiator,consisting of a series of elliptical shaped pipes g gg g &c., spirallycoiled in a circular form. By inspection of the drawings, it will beseen that when the damper f is closed, the smoke and all the otherproducts of combustion must pass through each and all of the pipes orbranches 9 g, g g &c., before entering the chimney, thus keeping thesmoke, &c., in the radiator, until all the heat is extracted therefrom,by which arrangement the fuel is used to the best advantage. The pipesbeing thus heated will form a large radiating surface, and keep the airin the surrounding air chamber, (constructed in any of the well knownways), constantly hot. When the fire is kindling, the damper f isopened, allowing the smoke &c. to pass directly into the chimney,instead of circulating through the radiator.

The radiator stands upon a hollow base it h which is divided into thesame number of chambers 2', '5 &c. as there are branches in theradiator, each compartment communicating with each branch, so as topermit the soot &c. which collects therein from time to time, to bereadily removed.

It will be obvious that the pipes can be made of a circular, square orelliptical shape, and that they can be coiled into a circular,elliptical or other form, without afiecting the general principle of theinvention.

Having thus described my improvement in heating apparatus, I shall statemy claim as follows.

What I claim as my invention and desire to have secured to me by LettersPatent is A spiral radiator, constructed substantially as abovedescribed, whether the pipe be of a round, square or oval form insection, or the coils be round, square or other shape.

APOLLOS RICHMOND.

WVitnesses:

BENJ. T. EAMES, Gr. GILBERT RICHMOND.

